In a large rimmed baking sheet, toss cauliflower,olive oil, onion, dried thyme, salt, and pepper until all coated and mixed together. Bake until the cauliflower is cooked though and slightly browned, about 20 minutes. Course chop.

Melt the better in a large skillet. Add cauliflower mixture and chopped ham. Cook until all is caramelized and cooked through, about 6 minutes.